<template>
  <div id="app">
    <component :is="view"></component>
  </div>
</template>

<script>

import login from './components/login.vue'
import index from './components/index.vue'

export default {
  name: 'App',
  computed:{
    view(){
      return this.$store.state.appView;
    }
  },
  components:{
    login,index
  },
   created(){ 
            //在页面加载时读取sessionStorage里的状态信息
        if (sessionStorage.getItem("store") ) { 
            this.$store.replaceState(JSON.parse(sessionStorage.getItem("store")));
        }

        //在页面刷新时将vuex里的信息保存到sessionStorage里
        window.addEventListener("beforeunload",()=>{
          sessionStorage.setItem("store",JSON.stringify(this.$store.state))
        })
  }
}
</script>

<style>
#app {
  font-family: 'Avenir', Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;

}
</style>
